8601421 has 2 divisors, whose sum is σ = 8601422. Its totient is φ = 8601420.

The previous prime is 8601401. The next prime is 8601443. The reversal of 8601421 is 1241068.

It is an a-pointer prime, because the next prime (8601443) can be obtained adding 8601421 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8555625 + 45796 = 2925^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 8601421 - 2⁵ = 8601389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8601392 and 8601401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8601401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4300710 + 4300711.

It is an arithmetic number, because the mean of its divisors is an integer number (4300711).

Almost surely, 2^8601421 is an apocalyptic number.

It is an amenable number.

8601421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8601421 is an equidigital number, since it uses as much as digits as its factorization.

8601421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 8601421 is about 2932.8179282049. The cubic root of 8601421 is about 204.8912451104.

Adding to 8601421 its reverse (1241068), we get a palindrome (9842489).

The spelling of 8601421 in words is "eight million, six hundred one thousand, four hundred twenty-one".